Josef leidl



UNITED STATES PATENT OFFICE.

JOSEF LEIDL, OF NUREMBERG, GERMANY.

PROCESS'OF MAKING TRACING, REPRINTING, AND TRANSFER PAPER.

$PECIEICATION forming part of Letters Patent No. 355,022, dated December28, 1886.

Application flled Augnsi 10, 1886. Serial No. 10,566. (No specimens.)

To all whom it may concern:

Be it known that I, J OSEF LEIDL, a resident of Nuremberg, Germany, haveinvented an Improved Process of Making Tracing, Re-

printing, and Transfer Paper, of which the following is a completespecification Lithographers transfer-paper as heretofore made isobjectionable, because liable to be drawn out of shape. The object of myinven- IO tion is to render such paper absolutely inelastic, so that itcannot be drawn out ofshape, and to make it capable of being washed,atthe same time leaving it transparent, fine, and pliable. On this paperthe finest drawings and sketches can beexecuted, to be transferred tolithographic stone, even if the drawing should be several days old. Thedrawing can also be partly or wholly washed off and renewed. Nomanipulation to which the paper 2o will be exposed will draw it out ofshape. It

will always retain its original form. The paper is applicable to alluses to which such transparent paper can be put.

I produce the paper as follows: I first cover the surface of alithographic stone, which has the size of the paper to be treated, withboiled linseedoil, which I apply with a roller. I

place the paper upon the stone so prepared and put upon its top a lightsheet of zinc or other sheet and draw the stone carrying the paper andits covering through a lithographic press. This causes the linseedoil tothoroughly permeate the paper. The paper is now taken from the stone,turned around, and treated on its other face the same as described,after which it is taken off and hung up to dry.

WVhen nearly dry,which is after about twentyfour hours, the paper isonce more subjected to the same treatment. The paper having been thusprepared and allowed to become about half dry, is next covered with amixture composed of about two parts of siccative coachvarnish and onepart of pure odorless turpentine. For this purpose the paper is placedIt is then etched again.

with the aid ofa soft brush. It is then hung up to dry, which requiresabout twenty-four hours. The dry paper is then placed upon a sheet ofzinc, and with a soft sponge washed with soap and water, then rinsedwith clean water, again well dried, and on aclean lithographic stonedrawn once more through the lithographic press. Finally,itisdraw'nthrough and finished in an ordinary glazing-machine. 5 The paper thusprepared can be readily washed and cannot be drawn out of shape, as hasalready been stated. When to be drawn upon, it is immediately before useplaced between two sheets of, clean and smooth paper and slowly rubbedwith a palette-knife or foldingbone.

'To use it as a transfer paper, it is manipu lated as follows: From theoriginal,which may be an engraved orlithographed stone, is made a strongdry transfer on said paper, and the latter then in a dry condition ispressed on another stone. The lastmentioned stone, which must be cleanand dry, is now rubbed with fibrous gypsum and lightly etched, and thenthe printing coloris rolled into it, so that the complete drawingbecomes pereceivable. Finally, the drawing is washed from the stone,.thefinal-color for printing rubbed in, and the printing proceeded with.

I claim" p The process herein described of preparing tracing,reprinting, and transfer paper, which consists in first coating saidpaper with boiled 8c Witnesses:

ANDR. STICK, FRIEDR. Sonarz.

